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- Description
- Fitment
- Warranty and Refund
- Reviews
The Motorad UltraStat 5426-190 is engineered for durability where it matters most. Constructed from heavy gauge stainless steel, this thermostat resists corrosion and stands up to the demanding conditions found in diesel truck cooling systems. Its exclusive BLVT Valve Technology helps minimize thermal shock to surrounding cooling system components, supporting more stable engine operating temperatures over time. Inside, a stainless steel thermal element pairs with Motorad's REAX wax mixture formulation to help the valve respond more quickly to temperature changes. Backed by a Limited Lifetime warranty, the 5426-190 fits a wide range of Dodge, Ram, and Ford applications spanning model years 1998 through 2025, including popular heavy-duty diesel engines. Whether you're maintaining a work truck or restoring an older diesel platform, this thermostat is built to deliver dependable, long-term performance.
Features
- Heavy gauge stainless steel construction resists corrosion for long-term cooling system reliability.
- Exclusive BLVT Valve Technology minimizes thermal shock to protect surrounding cooling components.
- Stainless steel thermal element offers unmatched corrosion resistance versus standard materials.
- REAX wax mixture formulation delivers quicker valve reaction time to temperature changes.
- Includes O-Ring seal, simplifying installation without sourcing a separate gasket.
Application Summary
1998 Dodge Ram 2500 5.9L -CC 359CID L6 OHV 12 Valve Turbocharged DIESEL1998 Dodge Ram 3500 5.9L -CC 359CID L6 OHV 12 Valve Turbocharged DIESEL
1999-2007 Dodge Ram 2500 5.9L -CC 359CID L6 OHV 24 Valve Turbocharged DIESEL
1999-2008 Dodge Ram 3500 5.9L -CC 359CID L6 OHV 24 Valve Turbocharged DIESEL
2006-2009 Dodge Ram 4000 5.9L -CC 359CID L6 OHV 24 Valve Turbocharged DIESEL
2007, 2010 Dodge Ram 2500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2007-2010 Dodge Ram 3500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2008-2009 Dodge Ram 2500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS
2008-2010 Dodge Ram 4500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2008-2010 Dodge Ram 5500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2008-2010 Ford F-650 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2008-2010 Ford F-750 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2010 Dodge Ram 4000 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2011-2013 Ram 4000 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2011-2021, 2023-2025 Ram 2500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2011-2023 Ram 4500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2011-2023 Ram 5500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2011-2025 Ram 3500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2022 Ram 2500 6.4L 6424CC 392CID V8 OHV 16 Valve Naturally Aspirated GAS
Specifications
- Brand: Motorad
- Part Number: 5426-190
- Part Type: Engine Coolant Thermostat
- UPC: 055644594262
- GTIN: 00055644594262
- Item Dimensions: 2.2500 x 2.2500 x 2.2500 IN
- Package Dimensions: 2.2500 x 2.2500 x 2.2500 IN
- Package Weight: 0.1800 PG
- Package Quantity: 1 EA
- Material: Stainless Steel
- Gasket or Seal Pre-Installed: Yes
- Height Between Flanges: 1.32
- Height Between Flanges: 33.53
- MAP Controlled: No
- Color: Silver
- Gasket Or Seal Required: Yes
- Bolt Hole Quantity: 0
- Grade Type: OEM
Interchange
- CST: 5426-190
- Motorad: 5426-190
- FVP Caps & Thermostats: 5426-190
- Murray Temperature Control: MU55289
- Worldparts: 95426190
- Stant: 46289
- Pep Boys: 5426-190
- Chrysler: 5015090AB
- Chrysler: 5015090AC
- Chrysler: 5011456AA
- Chrysler: 5015708AA
- Chrysler: 5015708AB
- Chrysler: 5015708AC
- Chrysler: 5015090AA
- Balkamp: PM190-6245
Warranty
- Warranty Type: Lifetime
- Warranty Description: Limited Lifetime
Returns
30-Day Money-Back Guarantee
We want you to be completely satisfied with your purchase! If you are not happy for any reason, you may return the item within 30 days for a refund, minus shipping fees, provided that: The part is brand new, uninstalled, and undamaged in any way.
To initiate a return, please contact us or email support@mizumoauto.com for a Return Authorization Number (RMA) and the return shipping address. Returns without an RMA number will be refused and returned to you at your expense.
Return Requirements:
- Items must be securely packed in the original manufacturer's packaging.
- All original materials must be included, such as hardware, manuals, protective caps, wrapping, and instructions.
- You must obtain and retain the tracking number for your return.
Non-Returnable Items:
- Piston rings, main bearings, and rod bearings are non-returnable if the manufacturer’s seal or shrink-wrapped plastic has been opened. No exceptions—this ensures the integrity of the parts you receive.
We are not responsible for lost or damaged returns. If your return is lost or damaged during shipping, a refund cannot be issued, as the item cannot be resold or returned to the supplier. Please file a claim directly with your shipping carrier for reimbursement.
Refunds are processed within 1-2 business days after we receive and inspect the returned item. Please allow this processing time before inquiring about your refund status.
Warranty
Mizumo Auto provides a 90-day Limited Warranty against defects in workmanship and materials under normal service conditions, effective from the original delivery date.
This warranty is non-transferable and applies only to the original purchaser. Coverage is limited to the replacement or refund of defective products.
Exclusions:
The warranty does not cover labor costs, damage resulting from accidents, misuse, alterations, or unauthorized modifications, as well as additional expenses such as towing, fluids, oils, car rentals, and any other parts not included in the original purchase.
Warranty Claims Process:
- All warranty claims must be pre-authorized and returned prepaid to Mizumo Auto for inspection and approval.
- No exchanges will be made for products that have been damaged, misused, or improperly installed. We strongly recommend professional installation.
- The buyer assumes all risk of damage resulting from improper installation.
All disputes related to transactions shall be resolved by a court of competent jurisdiction in Los Angeles County, California.
Shipping
We offer Free UPS Ground or USPS Ground Advantage shipping within the continental U.S. (48 states).
Shipping to Other Locations:
A delivery surcharge applies to shipments to: Alaska, Hawaii, Puerto Rico, U.S. territories, APO/FPO addresses, Canada, and international destinations.
Order Processing & Tracking:
- Orders are shipped Monday through Friday, excluding holidays.
- Orders placed before 3:00 PM PST will ship the same day, unless unexpected delays occur.
- A tracking number will be emailed within one business day after shipping.
If you do not receive a tracking number, please:
- Check your spam/junk folder.
- If it's not there, contact us via phone or eBay message for assistance.
International Orders:
Import duties, taxes, and brokerage fees are not included in the shipping fee. Please check with your shipping carrier and local customs office regarding any applicable fees before placing your order.









